Jaar	Dagen met zware neerslag	Trendlijn    
1951	5	2,986
1952	4	3,082
1953	2	3,177
1954	4	3,273
1955	1	3,37
1956	3	3,465
1957	4	3,557
1958	3	3,641
1959	1	3,716
1960	4	3,781
1961	7	3,832
1962	6	3,867
1963	5	3,886
1964	8	3,888
1965	5	3,874
1966	5	3,846
1967	1	3,808
1968	0	3,764
1969	3	3,718
1970	3	3,669
1971	6	3,621
1972	2	3,573
1973	4	3,529
1974	7	3,487
1975	2	3,45
1976	3	3,419
1977	3	3,394
1978	1	3,375
1979	2	3,366
1980	5	3,364
1981	5	3,371
1982	2	3,388
1983	2	3,417
1984	6	3,457
1985	1	3,509
1986	6	3,572
1987	3	3,643
1988	3	3,721
1989	2	3,809
1990	3	3,904
1991	5	4,008
1992	4	4,121
1993	3	4,24
1994	7	4,364
1995	5	4,492
1996	5	4,622
1997	2	4,751
1998	7	4,88
1999	4	5,006
2000	4	5,129
2001	7	5,249
2002	7	5,367
2003	3	5,482
2004	12	5,595
2005	4	5,705
2006	5	5,814
2007	3	5,924
2008	7	6,033
2009	3	6,143
2010	7	6,253
2011	8	6,363